Simultaneous occurrence of multiple trichoblastomas and steatocystoma multiplex.

We present a 55-year old man who, since age 21, progressively developed multiple papules and nodules on the face and upper trunk. Light microscopic examination of some of the neoplasms showed trichoblastomas, while others had histopathological features of trichoepithelioma and steatocystoma. Simultaneous occurrence of multiple trichoblastomas/trichoepitheliomas and steatocystomas, not reported previously, could represent multiple neoplasms involving differentiation toward different components of the folliculosebaceous unit.